Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6f0ed01d9283e8…

MALICIOUS

PDF

40.5 KB Created: 2020-10-31 13:56:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a9d8bc72be1fa1ee226f88055ae5ccb9 SHA-1: 15868b7b2a6cf2f6d4db78248af2a15fee1f70af SHA-256: cd6f0ed01d9283e88020137ff0eaed616313241890cd7f4a7051758ea9f3f14d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with critical heuristics indicating it's a malicious redirector and a link farm. One of the primary links points to 'gettraff.ru', a known malicious redirector. The document body itself is largely obfuscated but contains the same URL, suggesting an attempt to lure users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/aws?keyword=focus+group+discussion+guide+template In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f8d21a555bcd.pdfIn PDF document text
    • https://tedomidile.weebly.com/uploads/1/3/2/7/132712102/8478014.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_5f9936a8ae9e4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0634/0515/files/gezelimepabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e08b54d8-d5da-4c13-874a-0bb1b53a62c7/85555250283.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/c._s_lewis_screwtape_letters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0695/1061/files/samsung_galaxy_s8_touchwiz_home_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/38580633459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1753/2101/files/57898209226.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef146c81-3554-497e-894e-d0920133bea5/element_riddles_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/10405136118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5628/1772/files/17897237013.pdfIn PDF document text
    • https://s3.amazonaws.com/suzitivasekoga/kaabil_full_movie_download_hd_720p_online.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F75 5348 bytes
SHA-256: 909042d7da42dbd8b23775b8bbc758bcbdabcdd49f12db296129550569615c07
font_01_sfnt_off00007192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7192 10444 bytes
SHA-256: 498736bf426ab29a4ec7fe03ad3595b82e26f5835e0b2fe2dd33ffbf172d26de

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